Sökning: "Reynolds Averaged Navier Stokes Simulation"

Visar resultat 1 - 5 av 26 uppsatser innehållade orden Reynolds Averaged Navier Stokes Simulation.

1. 1. Computational Fluid Dynamics and Modeling of a Free Surface Flow

   Master-uppsats, KTH/Skolan för teknikvetenskap (SCI)

   Författare :Mathieu Marmier; [2023]
   Nyckelord :CFD; Free Surface Flow; VOF; STAR-CCM ; Multiphase Simulation; Nuclear Engineering; Fluid Mechanics;

   Sammanfattning : This project deals with the CFD modelling of a free surface flow. The aim is to develop and validate a fast and accurate numerical model for stratified two-phase flows. Volume of Fluid (VOF) multiphase model is employed. The purpose is to use the developed numerical model for the design of an element within a compact nuclear reactor. LÄS MER

3. 2. Simulation of Combustion in a Hybrid Rocket Engine

   Master-uppsats, KTH/Skolan för teknikvetenskap (SCI)

   Författare :Oscar Andersson; [2023]
   Nyckelord :Thesis; Hybrid Rocket Engine; CFD; computational fluid dynamics; combustion;

   Sammanfattning : A numerical investigation on the combustion mechanics of a hybrid rocket engine is performed through unsteady Reynolds-averaged Navier-Stokes simulation. The hybrid rocket engine model is based on an experimental laboratory scale engine design operating on GOX and HDPE as a propellant. LÄS MER

4. 3. Active flow control of the turbulent boundary layer over a NACA4412 wing profile for skin friction drag reduction

   Master-uppsats, KTH/Teknisk mekanik

   Författare :Giacomo Semprini Cesari; [2023]
   Nyckelord :Active flow control; drag reduction; numerical simulations; turbulent boundary layer; wings;

   Sammanfattning : In the context of building a framework for active flow control of turbulent boundary layers in wings, a set of large-eddy simulation (LES) are implemented in OpenFOAM. The flow around a NACA4412 wing profile is simulated at 5° angle of attack and Re_c = 400˙000. LÄS MER

5. 4. Uncertainty quantification for offshore wind turbines

   Master-uppsats, KTH/Matematik (Avd.)

   Författare :Ziming Wang; [2022]
   Nyckelord :wind energy; uncertainty propagation; polynomial chaos; Rosenblatt transformation; quadrature; regression; vindenergi; osäkerhetsutbredning; polynomkaos; Rosenblatt transformation; kvadratur; regression;

   Sammanfattning : Wind energy is a field with a large number of uncertainties. The random nature of the weather conditions, including wind speed, wind direction, and turbulence intensity, influences the energy output and the structural safety of a wind farm, making its performance fluctuate and difficult to predict. LÄS MER

7. 5. Inverse Atmospheric Dispersion Modeling in Complex Geometries

   Uppsats för yrkesexamina på avancerad nivå, Umeå universitet/Institutionen för fysik

   Författare :Charlie Pelland; [2022]
   Nyckelord :atmospheric dispersion modeling; dispersion modeling; invers dispersion modeling; atmospheric dispersion; invers atmospheric dispersion; CFD; computational fluid dynamics; radioactive release; openfoam; CRBN; dry deposition; dry deposition velocity; scavenging effect; wet deposition; optimization model; Reynolds Averaged Navier-Stokes; adjoint mode; time-dependent rain simulation; time-dependent rain; time dependent rain simulation; time dependent rain;

   Sammanfattning : In the event of a radioactive release in an urban environment the consequent response mustbe swift and precise. As soon as first responders have correct information, they can make anaccurate risk assessment. However, if the position, release rate and time of the radioactiverelease is unknown it is hard to know how the pollutant will spread. LÄS MER